Wrench



INVENTOR NEY 7 2 l m 5 T 5 n 8, 1

do 0 m N m m. m 6 R am EWJ H w l m April 19, 1932.

Patented Apr. 19, 1932 UNITED STATES HAROLD E. GRAIN, or BLACK RIVER, NEW YORK warmer:

Application filed July 26, 1930. Serial No. 470,969.

The object of this invention is the provision of a nut engaging wrench of an extremely simple construction which embodies only two parts, that is, a handle carrying stationary jaw and a movable jaw, the movable jaw being so associated with the stationary jaw as to permit of the same canting and having a biting engagement with the handle of the stationary jaw for holding the 19 same against movement when in nut engagement.

For a full and comprehensive understanding of the invention reference is to be had to the drawings which accompany and form part of this application.

In the drawings:

Figure 1 is a side elevation of my improved wrench.

Figure 2 is an edge view thereof.

Figure 3 is a sectional view approximately on the line 3-3 of Figure 2.

Figure 4 is a perspective view of the movable jaw.

The wrench embodies a flat handle 1 formed at its outer end with a hook 2 whereby cotter pins or the like can be readily removed, the end of the handle provided with the hook being elongated. This end is also provided with a round opening whereby the wrench may be suspended from a suitable support when not in use. The handle is provided with an outer portion which I will refer to as a head and which is indicated by the numeral 3. On one end of the head there is integrally arranged the fixed jaw 4, the inner wall of the fixed jaw being cut angularly and merging into a straight extension that provides the outer end of the head proper.

The flat head 3 on its opposite side and a suitable distance inward of the jaw 4 and the mentioned outer straight wall 5 is provided with transverse lugs 6, and the outer walls of the said lugs are arranged in parallelism and the said side walls are also disposed at the same inclination as the outer end or wall 5 of the head.

The movable jaw 7 is shaped to correspond with the fixed jaw 4, but the said movable jaw is formed at its inner end with a shank extension 8 which is bifurcated, as at 9, and

the side walls provided by the bifurcation are thickened on the outer face of the shank 8. These thickened portions are formed with registering transversely arranged slots or notches 10, and the said notches have their end walls provided with diagonally arranged inwardly extending rounded fulcrum ribs 11 and 12, respectively. The lower ribs 12 are arranged in a line with the inner face of the shank 8 and the upper ribs 11 are arranged in a line with the outer face of the shank 8 By reference to Figure 2 of the drawings and also by reference to the dotted lines in Figure 1 of the drawings it will be seen that the slot 9 in the shank, at the juncture of the head, terminates in a straight wall 13 and in an angle wall 14, the angle wall communicating with the active face of the jaw 7 and there is a space between these walls when the jaw 7 is arranged upon the head 3 of the bandle member 1. When so arranged the notches 10 receive therein the lugs 6 on the head 3. The jaw 7 can be readily slid over the lugs and when brought against a nut or like object the jaw 7 will slightly cant upon the fulcrum ribs 11 and 12 so that there is a biting engagement between the said ribs and the outer walls 15 provided by the lugs 6. To release the wrench from engagement with the nut or like object it is merely necessary to turn the handle slightly in a reverse direction which will permit of the jaw 7- bein slid over the ribs away from such object; i stop element 16, such as a headed screw or bolt is inserted in one side of the head 3 and 5 holds the jaw 7 from moving off of the said head.

It is thought the foregoing description will fully and clearly set forth the construction, the advantages and the simplicity of the improvement without further detailed description.

Having described the invention, I claim:

A wrench comprising a flat handle having one of its ends widened to provide the same with a head, said head having one of its corners formed with a laterally extending jaw and having its sides provided with transverse lugs whose outer walls are arranged in a line with the outer end of the head, a movable jaw having a bifurcated shank and the confronting side walls provided by the bifurcation being notched transversely and said notches designed to receive therein the lugs 5 on the head, the diagonally opposed end walls provided by the notches being formed with transverse inwardly extending rounded fulcrum ribs, and the bifurcated portion of the movable jaw affording a space to receive therein the head portion of the handle to permit of the canting 0f the movable jaw when an object is engaged between the jaws, and likewise to permit of the adjustment of the movable jaw with respect to the fixed jaw, and a removable stop element for the movable'gj aw on the head. i. HAROLD E. GRAIN. 

